Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Patent
1982-11-01
1983-09-06
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
264204, 425 72S, D01F 700
Patent
active
044029004
ABSTRACT:
In conventional dry-spinning processes forming a hollow bundle of filaments, a heated inert gas is introduced to evaporate spinning solvent from the filaments, and a vacuum may be applied in the center of the bundle near the face of the spinneret to assist in drawing the heated inert gas through the filament bundle. A Coanda-flow entrainment device in the center of the bundle adjacent the spinneret face uses a small inlet gas flow directed along a Coanda surface. The device entrains gas, pulling it through the filament bundle and then directing it downward. This entrained flow can supplement or supplant the vacuum-induced flow through the filaments.
REFERENCES:
patent: 1933587 (1933-11-01), Dreyfus et al.
patent: 1942540 (1934-01-01), Dreyfus et al.
patent: 2131810 (1938-10-01), Kinsella et al.
patent: 3521325 (1970-07-01), Schippers
patent: 3737508 (1973-06-01), Weir
patent: 4123208 (1978-10-01), Klaver et al.
E. I. Du Pont de Nemours & Co.
Woo Jay H.
LandOfFree
Dry spinning process with a gas flow amplifier does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dry spinning process with a gas flow amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dry spinning process with a gas flow amplifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1591800